Index-head.



PATENTED APR. 30, 1907.

J. PARKER INDEX HEAD.

APELIOATIOH FILED FEB.5,1D04

3 SHEETS-SHBET 1,

III

PATENTED APR. 30, 1907.

J. PARKER.

INDEX HEAD.

APPLICATION FILED FEB. s, 1904.

ATTZ'Y."

TVS: 5.52.: i W

No. 851,831. PATENTED APR. a0, 1907. J. PARKER.

INDEX HEAD.

APPLICATION FILED FEB.6,19J4.

8 SHEETS-SHEET 3. Q

A.\ c K) a [I 1 i l 4 g 4 a 4 1 4." J a I r1441 241.. 4 M Q W 55 1 5 2- Q 1411! happ s Px'rnn'r NCE, RHODE ISLAND, ASSIGNOR.TO BROWN Y Enron.

"URING COMPANY, OF PROVIDENCE, .RHODE w OF. RHODE ISLAND.

ENEQEXEHEAE.

if i ,h 3 l.

To all 3'; aim/eerie:

. dons Penman, of the city at: .;u1311i) irovidence and State of Rhode islenril, h: IP'v'tHtE'd certain new and use! Improvements in lndex -fileads and I do hcreb declare the following specification; taken conne" drawings, fornnng a part of the same, to be a full, clear, and exact description thereof.

-'.l hc invention relates to index heads, such,

. for instance, as are. used in milling machinesfor su porting and presenting the, work to the mi ling cutters, either in making cuts extending parallel to the axis of the work or in makingspiral cuts. lihese index heads are rovided with an index plate in which are ormed one or more series of circularly arranged holes which cooperate with an index pi'ncarried in an arm secured to the index shaft which controls the angular position of the work supporting spindle. During the cutting operation the index pin engages a hole in the index plate and holds the work in a definitere'lation to the index plate. In

2 5 case a'straightcut is tobe'made the index plate'remains stationary during the cutting, while in the case of a spiral cut the index plate is rotated in a fixed ratio to the forward movement of, the work, thereby rotating the o worli'through the connection of the index plate with the index shaft.

The work is indexed after a out has been made by turning the index pin arm through the prcper angular distance with relation to the i ex plate, (the index pin being withdrawn from the hole in theplate) and then if crtii'ig the index pin in the proper hole in the index plate.

it is frequently desirable to start a cut at 1 a delir l e point on the work, as for instance in resetting work whichhas been previously cut ti sup er 114 n hod and removed from the work spindies or centers. ,It usually such cases that when the work secured in position with relation to supporting spindle and the index 1 ted tobring the work into proper etion to the cutter, the index pin *3 has been silica-firm of Letters Patent.

" inaction tied February 5, 1904- Serial llc. 192,231-

on with the accompanying Fig. 1.

in replacing work which has been par-'- with the proper hole in lineat s-t mania Patented April so, mm.

which the angular relation between the index plate and-index pin may be adjusted. to

either in index heads ada ted for strai ht:

work or in index heads a apted for spiral work. v

The features and combinations constituting the invention'will be set forth in theclaims and will be'unders tood from the following detailcd description of constructions embodying the invention and shown in the accompanying drawings.

In these di'awings-Figure 1 is aside. elevationof an index head adapted for either straight or spiral work, and somuch of the feedtableof a milling machine as is necessary to show the .manner' of connecting the index head with the feed screw of the feed table;

through the axis of the index shaft. Figs. 4 and 5 are details of the devices for connecting the index pin arm to the index shaft. Fig. 6 is a side elevation'of an index head adapted for straight work only. Fig. 7 is a vertical transverse section through'the axis of the index shaft in Fig. 6. Fig. 8 is a detail showing a modifiedform of means for effecting the relative angular adjustment between thein dex plate and the index pin arm.

The construction of 'the index heads shown "in the drawings is the same as the construction of such heads heretofo'rein use, except as to the relative adjustment between the index pin and index plate." Each of these index heads is provided with a spindle A adapted to support the work in'the usual manner and provided with a worm wheel A which is.

engaged by a worm B secured to an index shaft B5 In each head the spindle is indexed 'byturning the shaft B through the proper angular distance and is held in fixed Fig. 2 is a detail section on line 2-2' Fig. 3 is a transverse vertical section relation to the index plate D after being in;

dexed by the engagement of an index pm Q 1 th one of the holes in the plate.

then engaging theindex pin with the roper' The index 5 ate is provided been performed.

" As thus far described the construction and proper register with such hole after-thework' shown the arinH is carried in a block H into register, the

" In the form. of head shown in Figs. 1; and 3 the index plate D is secured to a sleevev E vwhich is moiinted on a hub E and is provided with a gear E The gear E is enga ed by av gear E driven from a gear E secure to a spiral gear E which in turn engaged and driven by a spiral gear E E. A car E which secured to a. gear E The gear E"; is engagedand driven by, a gear E 'se-' cured to the feed screw E which moves the feed table F on which the index head is se-- moving the indexpin C from the hole in the Index 1plate and turning the index shaft flhrou the proper 'angulardistance and hole inthe index plate.

with the usual'sector arms-G for indicating the hole into which the index pin should be inserted after the indexing as mode of operation of' the index-head is'sinnlar to index heads; heretofore in use.

In orderto enable the'index pm p the index pin'is not in as been adjusted into-the. desired angular relation to the cutter, the-arm H which carries the index pin C is so connected with the shaft B" that its angular relation to the'shaf-t may be varied. By varying the an ar re. lation of the index pin arniH with t e index shaft, the index pin may be adjusted with relation 'to the index-plate to bring the pin into register with the fproper hole without af-' fee-ting the position 0 the work with-relation to. the cutter. Instead of first ositioning the work and then bringing the. pm and hole in may be first inserted in the hole in the in ex plate and then the index shaft adjusted relatively to the arm H to bring the work into exact position. The

means which is preferably employed for thus ex' pin arm and index" connecting the -ind shaft is best shown in Figs. 4 and 5. As here loosely mounted on the end of the shaft B. The block Hjis held in angular position upon the. shaftB by means of two adjusting screws H which engage opposite sidesof a stud H projecting from the shaft B. The block H is recessed about the stud I-I so that the an- 'gular position of the block upon the shaft secured to a. shaft I E is removably securedvto the end of the shaftE andis engaged by a gear:

. Y t t be brought into register with the proper hole in the index plate m case edin the proper hole.'in thefin Suppose for instance the may be varied by adjustin the screws H After'the blockhasbeen a justed it is held 'rigidly in position upon the shaft by'the engagement of' the adjusting screws with the opposite sides of the stud H The armH is so mounted in the block H that it may beadjusted radially of the index plate to bring the index pin into register with any one of the series of holes in the index plate. When adjusted the arm is clamped in position in the block H. by a boIt'H and clam ing plate H Instead of adjusting the in ex pin angu .larly with relation to the index plate, the. irelative adjustm'ent between the plate and 1ndex p1n may be affected by an adjustment of the index plate with relation to the sleeve 'E by which it." is turned in cutting spirals.

In Fig. 8. one form of means for effecting such adjustment, is," shown. In thisconstruction the devices employed for adjusting the index plate consistof two adjusting screws D" threaded iii lugs D on the sleeve E and engaging opposite sides of a lug D projecting from the/plate D. By turning these screws the plate may be adjusted angularly with relation tothe indexing pin without aifectin "the relation between the work spindle an the sleeve E, after thework has been prop erly positioned with relation to the cutter'for the purpose of bringing the pin and proper .indexhole into register.

In the head shown inFigs. 6 and 7 the index plate is secured fixed ositionupon I ead, and the angular a justment between the index finger and the index plate is.

affected-by adjustingfltheindex pin armfH about the shaft '13. by "the same devices al ready described inconnection" with Figs/4 and 5..

The relative angular-adjustments above describednot only enablethe work to be accurately' positioned'in any definite relation .to the cutter in'replacing work already cut or partlally cut, but they'also enable a fine adjustment of curately positioned and the index sitioned arid 'theindex inserted in the proper hole, and it is desiredv to make a fine adjustment ,between "the work and cutter, this may be done'b'y adjusting the shaft B in relation to thearm, H in' -the construction shown in Figs. 1 to v7 or bywadjustin'g the plate D in relation tothe sleeve Ein-the conthe work after it has been acinsert ex plate,.. work has been po-l' struction shown in Fig. 8. In either case the I work spindle be turned. without'disturbing the relation between the parts of the' in-.

dexing devices'and consequently'the succes-f sive' cuts Willa-be properly spaced by said de: vices.

What I to secure by Letters Patent'is:

1. In an index head the combinatiomwith the index plate claim asjmy invention and desire and the rotatable index member, of a blockarigularlyfadjustable about arm, adjusting screws in theblock,-'and a scribed.

: the index plate and the rotatable index n1e1n-' her, of an mdex pin arm, a blo'ek carrying the the member, and an index pin arm radially stud projecting from said member between adjustable in said block -substantially as dethe screws, substantially as described. a l JOHN PARKER.

Witnesses:

W. H. THURSTON, 'J. H. THURSTON.

- 2. In anindex head the combination, with 

